Alert archive / Montana / Severe Thunderstorm Warnings
Severe Thunderstorm Warnings in Montana, 2016
360 severe thunderstorm warnings in 2016. An alert counts here when it covered any part of the state, so the counties below add up to more than the state. The archive of severe thunderstorm warnings reaches back to 1986.
Severe Thunderstorm Warnings by county
Each county as a circle sized by its count in 2016. Tap one for its archive.
- Severe Thunderstorm Warnings
- 360
- Busiest month
- June157 severe thunderstorm warnings
- Busiest day
- June 11, 201635 severe thunderstorm warnings
Over time
By month
Warning verification
How often warnings here had a storm report inside them, and how much warning the reports had.
178 of 360 severe thunderstorm warnings covering Montana in 2016 had a qualifying storm report inside them; 415 of 599 hail, wind and damage reports fell inside a warning, on average 24 minutes after it went out.
Montana, 2016
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| Severe thunderstorm warnings | 360 | 178 | 51% | 599 | 69% | 24 min |
Each office's whole area, 2016
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| NWS Great Falls, MT: severe thunderstorm warnings | 106 | 48 | 55% | 177 | 60% | 20 min |
| NWS Missoula, MT: severe thunderstorm warnings | 19 | 14 | 26% | 41 | 46% | 12 min |
| NWS Billings, MT: severe thunderstorm warnings | 97 | 42 | 57% | 164 | 68% | 22 min |
| NWS Glasgow, MT: severe thunderstorm warnings | 144 | 78 | 46% | 242 | 78% | 28 min |
An office's figures cover every county it serves, including across state lines.
Verified by the Iowa Environmental Mesonet's Cow, which matches each storm-based warning with the local storm reports inside its polygon while it was in force, within 15 km of its edge: a tornado warning counts as verified on a tornado report, a severe thunderstorm warning on hail of 1 inch or more, a gust of 58 mph or more, or wind damage, a flash flood warning on a flash flood report. The false alarm ratio is the share of warnings with no such report; "inside a warning" is the probability of detection, the share of reports that fell inside one; lead time runs from the warning's issue to each report inside it, counting zero for a report that came first. A warning with no report is not proof nothing happened: reports come from spotters, the public and damage surveys, and are thin where few people live.
The alerts
Every alert, in the order issued. Times are local, Mountain Time. Each opens its own page with the text, the map, the radar and the sounding.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 19, 2:32 PM MDT | Severe Thunderstorm Warning | TFX | Fergus | 28 min |
| May 20, 7:05 PM MDT | Severe Thunderstorm Warning | BYZ | Powder River | 55 min |
| May 20, 8:57 PM MDT | Severe Thunderstorm Warning | BYZ | Carbon | 33 min |
| May 21, 2:01 PM MDT | Severe Thunderstorm Warning | BYZ | Carbon, Stillwater | 59 min |
| May 21, 2:12 PM MDT | Severe Thunderstorm Warning | BYZ | Stillwater | 52 min |
| May 21, 2:40 PM MDT | Severe Thunderstorm Warning | BYZ | Big Horn, Carbon, Golden Valley, Musselshell, Stillwater, Wheatland and 1 more | 65 min |
| May 21, 3:29 PM MDT | Severe Thunderstorm Warning | BYZ | Musselshell, Yellowstone | 61 min |
| May 21, 4:16 PM MDT | Severe Thunderstorm Warning | BYZ | Musselshell, Rosebud, Treasure, Yellowstone | 59 min |
| May 21, 4:49 PM MDT | Severe Thunderstorm Warning | GGW | Garfield | 56 min |
| May 21, 5:41 PM MDT | Severe Thunderstorm Warning | BYZ | Rosebud | 45 min |
| May 21, 5:42 PM MDT | Severe Thunderstorm Warning | GGW | Garfield, Valley | 63 min |
| May 21, 5:53 PM MDT | Severe Thunderstorm Warning | GGW | Phillips, Valley | 67 min |
| May 21, 5:57 PM MDT | Severe Thunderstorm Warning | BYZ | Big Horn, Powder River, Rosebud | 63 min |
| May 21, 6:04 PM MDT | Severe Thunderstorm Warning | GGW | Phillips, Valley | 26 min |
| May 21, 6:10 PM MDT | Severe Thunderstorm Warning | GGW | Valley | 48 min |
| May 21, 6:18 PM MDT | Severe Thunderstorm Warning | GGW | Garfield, McCone, Valley | 57 min |
| May 21, 6:26 PM MDT | Severe Thunderstorm Warning | GGW | Phillips, Valley | 64 min |
| May 21, 6:53 PM MDT | Severe Thunderstorm Warning | GGW | Garfield, McCone, Prairie | 45 min |
| May 21, 7:06 PM MDT | Severe Thunderstorm Warning | GGW | Daniels, McCone, Roosevelt, Valley | 54 min |
| May 21, 7:18 PM MDT | Severe Thunderstorm Warning | GGW | Valley | 27 min |
| May 21, 7:45 PM MDT | Severe Thunderstorm Warning | GGW | Garfield, Valley | 30 min |
| May 21, 7:49 PM MDT | Severe Thunderstorm Warning | GGW | Daniels, Roosevelt, Valley | 14 min |
| May 24, 6:36 PM MDT | Severe Thunderstorm Warning | BYZ | Big Horn | 39 min |
| May 24, 7:27 PM MDT | Severe Thunderstorm Warning | BYZ | Big Horn, Rosebud | 63 min |
| May 25, 3:34 PM MDT | Severe Thunderstorm Warning | BYZ | Big Horn | 56 min |
| May 25, 4:26 PM MDT | Severe Thunderstorm Warning | BYZ | Big Horn | 40 min |
| May 25, 8:04 PM MDT | Severe Thunderstorm Warning | BYZ | Big Horn, Yellowstone | 40 min |
| Jun 7, 6:18 PM MDT | Severe Thunderstorm Warning | BYZ | Golden Valley, Stillwater, Sweet Grass, Wheatland | 42 min |
| Jun 7, 7:26 PM MDT | Severe Thunderstorm Warning | BYZ | Yellowstone | 49 min |
| Jun 7, 8:02 PM MDT | Severe Thunderstorm Warning | BYZ | Musselshell, Yellowstone | 43 min |
| Jun 8, 4:42 PM MDT | Severe Thunderstorm Warning | MSO | Flathead | 33 min |
| Jun 8, 4:52 PM MDT | Severe Thunderstorm Warning | MSO | Mineral, Sanders | 23 min |
| Jun 8, 4:57 PM MDT | Severe Thunderstorm Warning | MSO | Mineral, Sanders | 33 min |
| Jun 8, 6:06 PM MDT | Severe Thunderstorm Warning | MSO | Flathead | 24 min |
| Jun 8, 6:16 PM MDT | Severe Thunderstorm Warning | MSO | Flathead | 29 min |
| Jun 8, 6:22 PM MDT | Severe Thunderstorm Warning | MSO | Lake, Sanders | 24 min |
| Jun 8, 6:37 PM MDT | Severe Thunderstorm Warning | MSO | Mineral, Missoula, Sanders | 38 min |
| Jun 8, 6:43 PM MDT | Severe Thunderstorm Warning | TFX | Cascade | 47 min |
| Jun 8, 6:44 PM MDT | Severe Thunderstorm Warning | MSO | Lake | 28 min |
| Jun 8, 9:12 PM MDT | Severe Thunderstorm Warning | MSO | Deer Lodge, Granite, Powell, Silver Bow | 33 min |
| Jun 9, 1:22 PM MDT | Severe Thunderstorm Warning | TFX | Fergus | 53 min |
| Jun 9, 1:42 PM MDT | Severe Thunderstorm Warning | TFX | Hill | 48 min |
| Jun 9, 1:43 PM MDT | Severe Thunderstorm Warning | TFX | Cascade, Chouteau, Fergus, Judith Basin | 47 min |
| Jun 9, 1:55 PM MDT | Severe Thunderstorm Warning | TFX | Fergus | 38 min |
| Jun 9, 2:17 PM MDT | Severe Thunderstorm Warning | TFX | Blaine, Hill | 37 min |
| Jun 9, 2:18 PM MDT | Severe Thunderstorm Warning | TFX | Chouteau, Fergus, Judith Basin | 42 min |
| Jun 9, 2:19 PM MDT | Severe Thunderstorm Warning | GGW | Sheridan | 24 min |
| Jun 9, 2:24 PM MDT | Severe Thunderstorm Warning | TFX | Cascade, Judith Basin, Meagher | 66 min |
| Jun 9, 2:28 PM MDT | Severe Thunderstorm Warning | TFX | Broadwater, Cascade, Judith Basin, Meagher | 39 min |
| Jun 9, 2:31 PM MDT | Severe Thunderstorm Warning | TFX | Fergus | 29 min |
| Jun 9, 2:34 PM MDT | Severe Thunderstorm Warning | TFX | Broadwater, Cascade, Lewis and Clark, Meagher | 56 min |
| Jun 9, 2:51 PM MDT | Severe Thunderstorm Warning | TFX | Fergus | 54 min |
| Jun 9, 2:57 PM MDT | Severe Thunderstorm Warning | TFX | Fergus | 33 min |
| Jun 9, 3:06 PM MDT | Severe Thunderstorm Warning | GGW | Garfield, Petroleum | 54 min |
| Jun 9, 3:18 PM MDT | Severe Thunderstorm Warning | TFX | Cascade, Chouteau, Fergus, Judith Basin | 57 min |
| Jun 9, 3:21 PM MDT | Severe Thunderstorm Warning | TFX | Cascade, Chouteau, Judith Basin, Meagher | 54 min |
| Jun 9, 3:42 PM MDT | Severe Thunderstorm Warning | TFX | Fergus | 16 min |
| Jun 9, 3:58 PM MDT | Severe Thunderstorm Warning | GGW | Garfield, Petroleum | 62 min |
| Jun 9, 4:12 PM MDT | Severe Thunderstorm Warning | TFX | Fergus, Judith Basin | 13 min |
| Jun 9, 4:55 PM MDT | Severe Thunderstorm Warning | GGW | Garfield | 65 min |
| Jun 9, 5:22 PM MDT | Severe Thunderstorm Warning | GGW | Phillips, Valley | 42 min |
| Jun 9, 5:31 PM MDT | Severe Thunderstorm Warning | BYZ | Golden Valley, Musselshell | 59 min |
| Jun 9, 5:32 PM MDT | Severe Thunderstorm Warning | GGW | Garfield, Petroleum | 43 min |
| Jun 9, 5:55 PM MDT | Severe Thunderstorm Warning | BYZ | Musselshell | 65 min |
| Jun 9, 5:57 PM MDT | Severe Thunderstorm Warning | GGW | Dawson, Garfield, McCone, Prairie | 63 min |
| Jun 9, 6:15 PM MDT | Severe Thunderstorm Warning | GGW | Garfield, Petroleum | 60 min |
| Jun 9, 6:22 PM MDT | Severe Thunderstorm Warning | BYZ | Rosebud, Treasure, Yellowstone | 38 min |
| Jun 9, 6:57 PM MDT | Severe Thunderstorm Warning | BYZ | Musselshell, Rosebud, Treasure, Yellowstone | 63 min |
| Jun 9, 6:57 PM MDT | Severe Thunderstorm Warning | GGW | Roosevelt, Sheridan | 18 min |
| Jun 9, 6:58 PM MDT | Severe Thunderstorm Warning | BYZ | Custer, Powder River | 47 min |
| Jun 9, 6:58 PM MDT | Severe Thunderstorm Warning | GGW | Dawson, McCone, Prairie, Wibaux | 62 min |
| Jun 9, 7:14 PM MDT | Severe Thunderstorm Warning | GGW | Garfield | 31 min |
| Jun 9, 7:41 PM MDT | Severe Thunderstorm Warning | BYZ | Rosebud | 28 min |
| Jun 9, 7:55 PM MDT | Severe Thunderstorm Warning | GGW | Dawson, Wibaux | 39 min |
| Jun 9, 8:17 PM MDT | Severe Thunderstorm Warning | BYZ | Custer, Fallon | 58 min |
| Jun 9, 8:41 PM MDT | Severe Thunderstorm Warning | GGW | Dawson, McCone, Prairie, Wibaux | 49 min |
| Jun 10, 3:20 PM MDT | Severe Thunderstorm Warning | TFX | Cascade, Chouteau, Judith Basin | 25 min |
| Jun 10, 3:45 PM MDT | Severe Thunderstorm Warning | TFX | Cascade, Chouteau, Fergus | 45 min |
| Jun 10, 4:30 PM MDT | Severe Thunderstorm Warning | TFX | Blaine, Chouteau, Fergus | 60 min |
| Jun 10, 4:37 PM MDT | Severe Thunderstorm Warning | TFX | Cascade, Chouteau, Judith Basin | 38 min |
| Jun 10, 5:14 PM MDT | Severe Thunderstorm Warning | TFX | Chouteau, Fergus, Judith Basin | 46 min |
| Jun 10, 5:17 PM MDT | Severe Thunderstorm Warning | TFX | Blaine, Fergus | 43 min |
| Jun 10, 6:00 PM MDT | Severe Thunderstorm Warning | TFX | Blaine, Chouteau, Fergus | 30 min |
| Jun 10, 6:17 PM MDT | Severe Thunderstorm Warning | TFX | Fergus | 28 min |
| Jun 10, 6:20 PM MDT | Severe Thunderstorm Warning | GGW | Phillips | 55 min |
| Jun 10, 6:24 PM MDT | Severe Thunderstorm Warning | TFX | Cascade, Judith Basin | 35 min |
| Jun 10, 6:31 PM MDT | Severe Thunderstorm Warning | TFX | Fergus | 29 min |
| Jun 10, 6:52 PM MDT | Severe Thunderstorm Warning | TFX | Blaine, Fergus | 38 min |
| Jun 10, 7:11 PM MDT | Severe Thunderstorm Warning | GGW | Phillips | 64 min |
| Jun 10, 7:16 PM MDT | Severe Thunderstorm Warning | TFX | Chouteau, Fergus | 57 min |
| Jun 10, 7:20 PM MDT | Severe Thunderstorm Warning | GGW | Garfield, Petroleum, Phillips | 55 min |
| Jun 10, 7:30 PM MDT | Severe Thunderstorm Warning | TFX | Fergus | 15 min |
| Jun 10, 8:12 PM MDT | Severe Thunderstorm Warning | TFX | Blaine, Fergus | 45 min |
| Jun 10, 8:28 PM MDT | Severe Thunderstorm Warning | TFX | Blaine, Chouteau, Fergus, Judith Basin | 47 min |
| Jun 10, 8:36 PM MDT | Severe Thunderstorm Warning | GGW | Garfield, Petroleum, Phillips | 54 min |
| Jun 10, 9:15 PM MDT | Severe Thunderstorm Warning | TFX | Blaine, Chouteau, Fergus, Judith Basin | 30 min |
| Jun 10, 9:28 PM MDT | Severe Thunderstorm Warning | GGW | Garfield, Petroleum, Phillips, Valley | 62 min |
| Jun 10, 9:43 PM MDT | Severe Thunderstorm Warning | TFX | Fergus | 32 min |
| Jun 10, 9:50 PM MDT | Severe Thunderstorm Warning | GGW | Dawson, Garfield, McCone, Prairie, Richland | 55 min |
| Jun 10, 10:15 PM MDT | Severe Thunderstorm Warning | GGW | Phillips | 30 min |
| Jun 10, 10:26 PM MDT | Severe Thunderstorm Warning | GGW | Garfield, McCone, Prairie, Roosevelt, Valley | 64 min |
| Jun 10, 10:41 PM MDT | Severe Thunderstorm Warning | GGW | Dawson, McCone, Prairie | 64 min |
| Jun 10, 11:09 PM MDT | Severe Thunderstorm Warning | GGW | Phillips, Valley | 66 min |
| Jun 10, 11:41 PM MDT | Severe Thunderstorm Warning | GGW | Dawson, Richland, Wibaux | 64 min |
| Jun 11, 1:37 AM MDT | Severe Thunderstorm Warning | GGW | Daniels, Roosevelt, Valley | 53 min |
| Jun 11, 2:12 AM MDT | Severe Thunderstorm Warning | GGW | Daniels, McCone, Roosevelt, Valley | 47 min |
| Jun 11, 4:50 AM MDT | Severe Thunderstorm Warning | TFX | Cascade, Chouteau | 25 min |
| Jun 11, 4:50 AM MDT | Severe Thunderstorm Warning | TFX | Cascade, Chouteau | 25 min |
| Jun 11, 5:13 AM MDT | Severe Thunderstorm Warning | TFX | Cascade, Chouteau | 47 min |
| Jun 11, 5:18 AM MDT | Severe Thunderstorm Warning | TFX | Chouteau, Hill, Liberty | 42 min |
| Jun 11, 5:59 AM MDT | Severe Thunderstorm Warning | TFX | Chouteau, Hill | 46 min |
| Jun 11, 6:32 AM MDT | Severe Thunderstorm Warning | TFX | Blaine, Hill | 43 min |
| Jun 11, 9:32 AM MDT | Severe Thunderstorm Warning | GGW | Daniels, Valley | 43 min |
| Jun 11, 4:25 PM MDT | Severe Thunderstorm Warning | BYZ | Custer, Powder River | 65 min |
| Jun 11, 5:15 PM MDT | Severe Thunderstorm Warning | BYZ | Custer | 30 min |
| Jun 11, 5:44 PM MDT | Severe Thunderstorm Warning | BYZ | Custer | 61 min |
| Jun 11, 5:54 PM MDT | Severe Thunderstorm Warning | GGW | Dawson, Prairie | 66 min |
| Jun 11, 6:22 PM MDT | Severe Thunderstorm Warning | GGW | Garfield, McCone, Prairie | 53 min |
| Jun 11, 6:26 PM MDT | Severe Thunderstorm Warning | BYZ | Custer, Rosebud | 64 min |
| Jun 11, 6:32 PM MDT | Severe Thunderstorm Warning | BYZ | Powder River | 58 min |
| Jun 11, 6:58 PM MDT | Severe Thunderstorm Warning | BYZ | Fallon | 34 min |
| Jun 11, 7:01 PM MDT | Severe Thunderstorm Warning | BYZ | Powder River | 59 min |
| Jun 11, 7:20 PM MDT | Severe Thunderstorm Warning | BYZ | Powder River | 55 min |
| Jun 11, 7:55 PM MDT | Severe Thunderstorm Warning | BYZ | Custer, Powder River, Rosebud | 47 min |
| Jun 13, 1:49 PM MDT | Severe Thunderstorm Warning | BYZ | Yellowstone | 41 min |
| Jun 13, 3:06 PM MDT | Severe Thunderstorm Warning | GGW | Wibaux | 24 min |
| Jun 13, 3:09 PM MDT | Severe Thunderstorm Warning | BYZ | Rosebud | 66 min |
| Jun 13, 3:53 PM MDT | Severe Thunderstorm Warning | GGW | Prairie, Wibaux | 67 min |
| Jun 13, 5:07 PM MDT | Severe Thunderstorm Warning | GGW | Prairie | 53 min |
| Jun 14, 5:09 PM MDT | Severe Thunderstorm Warning | GGW | Garfield, Petroleum, Phillips, Valley | 51 min |
| Jun 14, 5:56 PM MDT | Severe Thunderstorm Warning | GGW | Daniels, Garfield, McCone, Phillips, Valley | 64 min |
| Jun 14, 6:55 PM MDT | Severe Thunderstorm Warning | GGW | Garfield, McCone, Roosevelt, Valley | 41 min |
| Jun 15, 10:42 PM MDT | Severe Thunderstorm Warning | GGW | Dawson, McCone, Richland, Roosevelt | 33 min |
| Jun 15, 11:18 PM MDT | Severe Thunderstorm Warning | GGW | Garfield, McCone, Roosevelt, Valley | 27 min |
| Jun 15, 11:44 PM MDT | Severe Thunderstorm Warning | GGW | Garfield, McCone, Valley | 46 min |
| Jun 15, 11:54 PM MDT | Severe Thunderstorm Warning | GGW | Daniels, McCone, Roosevelt, Valley | 35 min |
| Jun 16, 12:26 AM MDT | Severe Thunderstorm Warning | GGW | Garfield, McCone, Roosevelt, Valley | 49 min |
| Jun 16, 12:32 AM MDT | Severe Thunderstorm Warning | GGW | Garfield, Petroleum | 58 min |
| Jun 16, 1:01 AM MDT | Severe Thunderstorm Warning | GGW | Garfield, McCone, Richland, Roosevelt, Valley | 59 min |
| Jun 16, 1:24 AM MDT | Severe Thunderstorm Warning | GGW | Garfield, McCone, Valley | 66 min |
| Jun 16, 11:51 PM MDT | Severe Thunderstorm Warning | BYZ | Fallon | 24 min |
| Jun 17, 1:25 AM MDT | Severe Thunderstorm Warning | BYZ | Fallon | 21 min |
| Jun 17, 9:10 PM MDT | Severe Thunderstorm Warning | BYZ | Carter, Powder River | 28 min |
| Jun 18, 5:36 PM MDT | Severe Thunderstorm Warning | TFX | Blaine, Chouteau, Hill | 24 min |
| Jun 18, 6:29 PM MDT | Severe Thunderstorm Warning | TFX | Blaine | 31 min |
| Jun 18, 6:33 PM MDT | Severe Thunderstorm Warning | GGW | Phillips | 57 min |
| Jun 18, 7:22 PM MDT | Severe Thunderstorm Warning | GGW | Phillips, Valley | 53 min |
| Jun 18, 8:11 PM MDT | Severe Thunderstorm Warning | GGW | Daniels, Roosevelt, Valley | 64 min |
| Jun 18, 8:21 PM MDT | Severe Thunderstorm Warning | GGW | Garfield, McCone, Valley | 54 min |
| Jun 18, 8:45 PM MDT | Severe Thunderstorm Warning | GGW | Garfield, McCone, Prairie | 60 min |
| Jun 18, 9:02 PM MDT | Severe Thunderstorm Warning | GGW | Daniels, Dawson, McCone, Richland, Roosevelt, Sheridan and 1 more | 58 min |
| Jun 18, 9:45 PM MDT | Severe Thunderstorm Warning | GGW | Dawson, McCone, Prairie | 60 min |
| Jun 18, 9:54 PM MDT | Severe Thunderstorm Warning | GGW | Daniels, Richland, Roosevelt, Sheridan | 66 min |
| Jun 19, 12:03 AM MDT | Severe Thunderstorm Warning | GGW | Roosevelt, Sheridan | 42 min |
| Jun 21, 3:18 PM MDT | Severe Thunderstorm Warning | TFX | Blaine | 42 min |
| Jun 21, 3:44 PM MDT | Severe Thunderstorm Warning | GGW | Phillips | 61 min |
| Jun 21, 4:15 PM MDT | Severe Thunderstorm Warning | GGW | Phillips, Valley | 60 min |
| Jun 21, 4:41 PM MDT | Severe Thunderstorm Warning | GGW | Phillips | 64 min |
| Jun 21, 5:13 PM MDT | Severe Thunderstorm Warning | GGW | Valley | 62 min |
| Jun 21, 5:19 PM MDT | Severe Thunderstorm Warning | GGW | Phillips, Valley | 56 min |
| Jun 21, 6:13 PM MDT | Severe Thunderstorm Warning | GGW | McCone, Richland, Roosevelt, Valley | 62 min |
| Jun 21, 7:13 PM MDT | Severe Thunderstorm Warning | GGW | McCone, Richland, Roosevelt | 62 min |
| Jun 24, 4:17 PM MDT | Severe Thunderstorm Warning | TFX | Fergus | 13 min |
| Jun 24, 4:19 PM MDT | Severe Thunderstorm Warning | GGW | Garfield, Petroleum | 56 min |
| Jun 24, 5:26 PM MDT | Severe Thunderstorm Warning | GGW | Garfield | 64 min |
| Jun 24, 6:02 PM MDT | Severe Thunderstorm Warning | GGW | Garfield, McCone | 58 min |
| Jun 24, 6:38 PM MDT | Severe Thunderstorm Warning | GGW | Garfield, McCone, Roosevelt, Valley | 67 min |
| Jun 24, 6:48 PM MDT | Severe Thunderstorm Warning | GGW | Dawson, McCone, Prairie | 57 min |
| Jun 24, 7:46 PM MDT | Severe Thunderstorm Warning | GGW | Dawson, Richland, Wibaux | 59 min |
| Jun 24, 7:50 PM MDT | Severe Thunderstorm Warning | GGW | Richland, Roosevelt, Sheridan | 55 min |
| Jun 24, 8:45 PM MDT | Severe Thunderstorm Warning | GGW | Roosevelt, Sheridan | 60 min |
| Jun 28, 5:29 PM MDT | Severe Thunderstorm Warning | BYZ | Carter | 39 min |
| Jun 29, 4:11 PM MDT | Severe Thunderstorm Warning | BYZ | Sweet Grass, Wheatland | 64 min |
| Jun 30, 1:41 PM MDT | Severe Thunderstorm Warning | TFX | Glacier | 34 min |
| Jun 30, 1:55 PM MDT | Severe Thunderstorm Warning | TFX | Teton | 35 min |
| Jun 30, 2:14 PM MDT | Severe Thunderstorm Warning | TFX | Glacier | 46 min |
| Jun 30, 2:23 PM MDT | Severe Thunderstorm Warning | TFX | Teton | 37 min |
| Jun 30, 2:58 PM MDT | Severe Thunderstorm Warning | TFX | Glacier | 47 min |
| Jun 30, 3:00 PM MDT | Severe Thunderstorm Warning | TFX | Teton | 45 min |
| Jun 30, 3:27 PM MDT | Severe Thunderstorm Warning | TFX | Teton | 48 min |
| Jun 30, 3:45 PM MDT | Severe Thunderstorm Warning | TFX | Glacier | 45 min |
| Jun 30, 4:30 PM MDT | Severe Thunderstorm Warning | TFX | Glacier, Pondera, Toole | 45 min |
| Jun 30, 4:54 PM MDT | Severe Thunderstorm Warning | TFX | Chouteau, Hill | 36 min |
| Jun 30, 5:29 PM MDT | Severe Thunderstorm Warning | TFX | Chouteau, Hill | 46 min |
| Jun 30, 6:15 PM MDT | Severe Thunderstorm Warning | TFX | Chouteau | 30 min |
| Jun 30, 7:34 PM MDT | Severe Thunderstorm Warning | TFX | Hill | 26 min |
| Jun 30, 7:59 PM MDT | Severe Thunderstorm Warning | TFX | Hill | 31 min |
| Jun 30, 8:18 PM MDT | Severe Thunderstorm Warning | TFX | Hill, Liberty | 27 min |
| Jun 30, 9:56 PM MDT | Severe Thunderstorm Warning | TFX | Blaine, Hill | 34 min |
| Jul 2, 2:53 PM MDT | Severe Thunderstorm Warning | TFX | Blaine | 22 min |
| Jul 2, 3:58 PM MDT | Severe Thunderstorm Warning | BYZ | Custer | 52 min |
| Jul 2, 5:51 PM MDT | Severe Thunderstorm Warning | GGW | Wibaux | 39 min |
| Jul 2, 9:04 PM MDT | Severe Thunderstorm Warning | GGW | Dawson, Wibaux | 41 min |
| Jul 2, 10:08 PM MDT | Severe Thunderstorm Warning | GGW | Garfield, McCone, Prairie | 25 min |
| Jul 3, 2:17 AM MDT | Severe Thunderstorm Warning | GGW | Phillips, Valley | 58 min |
| Jul 5, 2:34 AM MDT | Severe Thunderstorm Warning | GGW | Richland | 22 min |
| Jul 5, 4:08 AM MDT | Severe Thunderstorm Warning | GGW | Richland, Wibaux | 37 min |
| Jul 6, 11:07 AM MDT | Severe Thunderstorm Warning | GGW | Garfield | 53 min |
| Jul 6, 11:40 AM MDT | Severe Thunderstorm Warning | GGW | Garfield | 65 min |
| Jul 6, 12:41 PM MDT | Severe Thunderstorm Warning | GGW | Dawson, Garfield, McCone, Prairie | 64 min |
| Jul 6, 12:56 PM MDT | Severe Thunderstorm Warning | BYZ | Custer, Rosebud | 64 min |
| Jul 6, 1:13 PM MDT | Severe Thunderstorm Warning | GGW | Dawson | 62 min |
| Jul 6, 1:43 PM MDT | Severe Thunderstorm Warning | GGW | Dawson, McCone, Prairie | 62 min |
| Jul 6, 2:04 PM MDT | Severe Thunderstorm Warning | GGW | Dawson, Wibaux | 56 min |
| Jul 6, 2:22 PM MDT | Severe Thunderstorm Warning | GGW | Dawson, Prairie | 53 min |
| Jul 6, 3:11 PM MDT | Severe Thunderstorm Warning | GGW | Dawson, Prairie, Wibaux | 49 min |
| Jul 6, 3:44 PM MDT | Severe Thunderstorm Warning | BYZ | Fallon | 35 min |
| Jul 6, 4:05 PM MDT | Severe Thunderstorm Warning | BYZ | Fallon | 25 min |
| Jul 8, 10:49 PM MDT | Severe Thunderstorm Warning | BYZ | Carter, Powder River | 22 min |
| Jul 9, 2:37 PM MDT | Severe Thunderstorm Warning | GGW | Petroleum | 38 min |
| Jul 9, 3:12 PM MDT | Severe Thunderstorm Warning | GGW | Garfield, Petroleum | 63 min |
| Jul 9, 4:13 PM MDT | Severe Thunderstorm Warning | GGW | Garfield | 62 min |
| Jul 9, 5:16 PM MDT | Severe Thunderstorm Warning | GGW | Garfield | 59 min |
| Jul 9, 6:04 PM MDT | Severe Thunderstorm Warning | GGW | Dawson, McCone, Prairie | 35 min |
| Jul 9, 7:04 PM MDT | Severe Thunderstorm Warning | GGW | Phillips, Valley | 56 min |
| Jul 9, 7:51 PM MDT | Severe Thunderstorm Warning | GGW | Garfield, McCone, Valley | 54 min |
| Jul 9, 9:06 PM MDT | Severe Thunderstorm Warning | MSO | Ravalli | 39 min |
| Jul 9, 9:33 PM MDT | Severe Thunderstorm Warning | BYZ | Custer, Fallon | 72 min |
| Jul 10, 2:06 PM MDT | Severe Thunderstorm Warning | BYZ | Fallon | 54 min |
| Jul 10, 2:34 PM MDT | Severe Thunderstorm Warning | BYZ | Big Horn, Powder River | 56 min |
| Jul 10, 2:38 PM MDT | Severe Thunderstorm Warning | BYZ | Fallon | 67 min |
| Jul 10, 2:43 PM MDT | Severe Thunderstorm Warning | GGW | Dawson, Prairie | 31 min |
| Jul 10, 3:27 PM MDT | Severe Thunderstorm Warning | BYZ | Powder River | 41 min |
| Jul 10, 3:31 PM MDT | Severe Thunderstorm Warning | BYZ | Carter, Fallon | 34 min |
| Jul 14, 3:44 PM MDT | Severe Thunderstorm Warning | GGW | Dawson, Prairie | 31 min |
| Jul 14, 4:05 PM MDT | Severe Thunderstorm Warning | GGW | Dawson, McCone | 25 min |
| Jul 15, 7:14 PM MDT | Severe Thunderstorm Warning | BYZ | Golden Valley, Wheatland | 47 min |
| Jul 15, 7:35 PM MDT | Severe Thunderstorm Warning | BYZ | Carbon, Stillwater, Sweet Grass | 40 min |
| Jul 15, 8:15 PM MDT | Severe Thunderstorm Warning | BYZ | Big Horn, Carbon, Stillwater, Yellowstone | 60 min |
| Jul 15, 9:04 PM MDT | Severe Thunderstorm Warning | BYZ | Big Horn, Treasure, Yellowstone | 56 min |
| Jul 16, 2:41 PM MDT | Severe Thunderstorm Warning | BYZ | Big Horn | 64 min |
| Jul 16, 3:24 PM MDT | Severe Thunderstorm Warning | BYZ | Powder River | 66 min |
| Jul 16, 3:31 PM MDT | Severe Thunderstorm Warning | BYZ | Big Horn | 48 min |
| Jul 16, 4:26 PM MDT | Severe Thunderstorm Warning | BYZ | Carter, Powder River | 18 min |
| Jul 16, 6:12 PM MDT | Severe Thunderstorm Warning | BYZ | Golden Valley, Musselshell | 40 min |
| Jul 16, 6:19 PM MDT | Severe Thunderstorm Warning | BYZ | Sweet Grass | 41 min |
| Jul 17, 2:40 PM MDT | Severe Thunderstorm Warning | TFX | Fergus, Judith Basin | 35 min |
| Jul 17, 8:57 PM MDT | Severe Thunderstorm Warning | TFX | Fergus | 47 min |
| Jul 17, 9:27 PM MDT | Severe Thunderstorm Warning | MSO | Granite, Lake, Missoula, Ravalli | 33 min |
| Jul 17, 10:08 PM MDT | Severe Thunderstorm Warning | MSO | Granite, Missoula, Powell | 52 min |
| Jul 18, 4:25 PM MDT | Severe Thunderstorm Warning | MSO | Lincoln | 35 min |
| Jul 18, 4:59 PM MDT | Severe Thunderstorm Warning | MSO | Flathead, Lincoln | 46 min |
| Jul 18, 6:04 PM MDT | Severe Thunderstorm Warning | TFX | Cascade, Meagher | 41 min |
| Jul 18, 6:43 PM MDT | Severe Thunderstorm Warning | TFX | Cascade, Judith Basin | 47 min |
| Jul 18, 7:46 PM MDT | Severe Thunderstorm Warning | TFX | Fergus, Judith Basin | 44 min |
| Jul 18, 8:30 PM MDT | Severe Thunderstorm Warning | TFX | Chouteau, Fergus | 45 min |
| Jul 18, 9:13 PM MDT | Severe Thunderstorm Warning | TFX | Blaine, Fergus | 50 min |
| Jul 18, 9:36 PM MDT | Severe Thunderstorm Warning | GGW | Phillips | 24 min |
| Jul 18, 9:55 PM MDT | Severe Thunderstorm Warning | GGW | Phillips | 65 min |
| Jul 18, 10:56 PM MDT | Severe Thunderstorm Warning | GGW | Garfield, Phillips, Valley | 64 min |
| Jul 18, 11:02 PM MDT | Severe Thunderstorm Warning | TFX | Glacier | 28 min |
| Jul 18, 11:40 PM MDT | Severe Thunderstorm Warning | GGW | Garfield, McCone | 65 min |
| Jul 18, 11:54 PM MDT | Severe Thunderstorm Warning | GGW | Garfield, McCone, Valley | 66 min |
| Jul 19, 12:27 AM MDT | Severe Thunderstorm Warning | GGW | Daniels, Dawson, McCone, Richland, Roosevelt, Valley | 63 min |
| Jul 19, 6:58 PM MDT | Severe Thunderstorm Warning | GGW | Garfield, McCone, Valley | 31 min |
| Jul 22, 5:35 PM MDT | Severe Thunderstorm Warning | BYZ | Fallon | 25 min |
| Jul 22, 6:05 PM MDT | Severe Thunderstorm Warning | TFX | Blaine, Chouteau, Fergus | 40 min |
| Jul 22, 6:07 PM MDT | Severe Thunderstorm Warning | BYZ | Fallon | 23 min |
| Jul 22, 6:13 PM MDT | Severe Thunderstorm Warning | GGW | Dawson, Prairie, Wibaux | 62 min |
| Jul 22, 8:30 PM MDT | Severe Thunderstorm Warning | GGW | Dawson, McCone, Prairie, Richland | 60 min |
| Jul 22, 8:45 PM MDT | Severe Thunderstorm Warning | GGW | McCone, Roosevelt, Valley | 45 min |
| Jul 22, 9:56 PM MDT | Severe Thunderstorm Warning | GGW | Daniels, Roosevelt, Sheridan, Valley | 64 min |
| Jul 26, 6:40 PM MDT | Severe Thunderstorm Warning | TFX | Hill | 35 min |
| Jul 27, 2:19 PM MDT | Severe Thunderstorm Warning | BYZ | Musselshell | 26 min |
| Jul 27, 3:01 PM MDT | Severe Thunderstorm Warning | BYZ | Yellowstone | 59 min |
| Jul 27, 3:26 PM MDT | Severe Thunderstorm Warning | GGW | Garfield, Petroleum, Phillips | 64 min |
| Jul 27, 3:39 PM MDT | Severe Thunderstorm Warning | BYZ | Big Horn | 37 min |
| Jul 27, 4:15 PM MDT | Severe Thunderstorm Warning | BYZ | Carbon, Stillwater, Yellowstone | 37 min |
| Jul 27, 4:27 PM MDT | Severe Thunderstorm Warning | GGW | Garfield, Phillips | 63 min |
| Jul 27, 5:13 PM MDT | Severe Thunderstorm Warning | BYZ | Golden Valley, Musselshell, Stillwater, Yellowstone | 47 min |
| Jul 27, 5:20 PM MDT | Severe Thunderstorm Warning | GGW | Garfield | 55 min |
| Jul 27, 5:43 PM MDT | Severe Thunderstorm Warning | BYZ | Yellowstone | 46 min |
| Jul 27, 6:10 PM MDT | Severe Thunderstorm Warning | GGW | Garfield | 34 min |
| Jul 27, 6:25 PM MDT | Severe Thunderstorm Warning | BYZ | Rosebud | 65 min |
| Jul 27, 6:36 PM MDT | Severe Thunderstorm Warning | GGW | Garfield | 54 min |
| Jul 27, 6:41 PM MDT | Severe Thunderstorm Warning | BYZ | Rosebud, Treasure | 64 min |
| Jul 27, 7:21 PM MDT | Severe Thunderstorm Warning | BYZ | Rosebud, Treasure | 54 min |
| Jul 27, 7:22 PM MDT | Severe Thunderstorm Warning | BYZ | Custer, Rosebud | 53 min |
| Jul 27, 7:26 PM MDT | Severe Thunderstorm Warning | BYZ | Custer, Powder River, Rosebud | 64 min |
| Jul 27, 7:27 PM MDT | Severe Thunderstorm Warning | GGW | Garfield | 36 min |
| Jul 27, 8:10 PM MDT | Severe Thunderstorm Warning | BYZ | Rosebud | 50 min |
| Jul 27, 8:21 PM MDT | Severe Thunderstorm Warning | BYZ | Powder River | 54 min |
| Jul 27, 9:01 PM MDT | Severe Thunderstorm Warning | BYZ | Custer, Powder River | 59 min |
| Jul 27, 9:14 PM MDT | Severe Thunderstorm Warning | BYZ | Powder River | 40 min |
| Jul 27, 9:29 PM MDT | Severe Thunderstorm Warning | GGW | McCone, Prairie | 61 min |
| Jul 27, 9:43 PM MDT | Severe Thunderstorm Warning | BYZ | Powder River | 25 min |
| Jul 27, 9:55 PM MDT | Severe Thunderstorm Warning | BYZ | Powder River | 21 min |
| Jul 30, 4:22 PM MDT | Severe Thunderstorm Warning | GGW | Phillips | 53 min |
| Jul 30, 5:08 PM MDT | Severe Thunderstorm Warning | GGW | Phillips | 67 min |
| Jul 30, 6:21 PM MDT | Severe Thunderstorm Warning | GGW | Phillips, Valley | 54 min |
| Jul 30, 6:51 PM MDT | Severe Thunderstorm Warning | GGW | Phillips, Valley | 54 min |
| Jul 30, 7:15 PM MDT | Severe Thunderstorm Warning | GGW | Daniels, Valley | 35 min |
| Jul 30, 7:41 PM MDT | Severe Thunderstorm Warning | GGW | Valley | 64 min |
| Jul 30, 8:12 PM MDT | Severe Thunderstorm Warning | GGW | Phillips, Valley | 33 min |
| Jul 30, 8:38 PM MDT | Severe Thunderstorm Warning | GGW | Garfield, McCone, Valley | 52 min |
| Jul 30, 9:18 PM MDT | Severe Thunderstorm Warning | GGW | Garfield, Valley | 57 min |
| Jul 30, 9:24 PM MDT | Severe Thunderstorm Warning | GGW | Garfield, McCone, Valley | 36 min |
| Jul 30, 9:53 PM MDT | Severe Thunderstorm Warning | GGW | McCone | 67 min |
| Jul 30, 10:10 PM MDT | Severe Thunderstorm Warning | GGW | Garfield, McCone, Valley | 35 min |
| Jul 30, 11:09 PM MDT | Severe Thunderstorm Warning | GGW | Dawson, McCone, Prairie | 30 min |
| Jul 31, 5:15 PM MDT | Severe Thunderstorm Warning | GGW | Daniels, Sheridan, Valley | 60 min |
| Jul 31, 6:07 PM MDT | Severe Thunderstorm Warning | GGW | Daniels, Sheridan | 16 min |
| Aug 1, 12:20 AM MDT | Severe Thunderstorm Warning | BYZ | Powder River | 30 min |
| Aug 2, 4:58 PM MDT | Severe Thunderstorm Warning | BYZ | Carter | 62 min |
| Aug 2, 5:50 PM MDT | Severe Thunderstorm Warning | BYZ | Carter, Powder River | 25 min |
| Aug 2, 6:18 PM MDT | Severe Thunderstorm Warning | BYZ | Carter | 45 min |
| Aug 2, 8:41 PM MDT | Severe Thunderstorm Warning | GGW | Prairie | 64 min |
| Aug 6, 4:18 PM MDT | Severe Thunderstorm Warning | MSO | Missoula, Ravalli | 42 min |
| Aug 7, 3:07 PM MDT | Severe Thunderstorm Warning | TFX | Broadwater, Jefferson, Lewis and Clark | 23 min |
| Aug 7, 3:30 PM MDT | Severe Thunderstorm Warning | TFX | Broadwater, Jefferson, Lewis and Clark | 30 min |
| Aug 7, 3:59 PM MDT | Severe Thunderstorm Warning | MSO | Silver Bow | 46 min |
| Aug 7, 4:00 PM MDT | Severe Thunderstorm Warning | TFX | Broadwater, Lewis and Clark, Meagher | 45 min |
| Aug 7, 4:08 PM MDT | Severe Thunderstorm Warning | TFX | Jefferson | 52 min |
| Aug 7, 4:45 PM MDT | Severe Thunderstorm Warning | TFX | Cascade, Judith Basin, Meagher | 60 min |
| Aug 7, 4:56 PM MDT | Severe Thunderstorm Warning | TFX | Broadwater, Jefferson | 49 min |
| Aug 7, 5:01 PM MDT | Severe Thunderstorm Warning | BYZ | Big Horn | 44 min |
| Aug 7, 5:44 PM MDT | Severe Thunderstorm Warning | BYZ | Big Horn, Rosebud | 61 min |
| Aug 7, 5:45 PM MDT | Severe Thunderstorm Warning | TFX | Broadwater, Meagher | 41 min |
| Aug 7, 5:46 PM MDT | Severe Thunderstorm Warning | TFX | Fergus, Judith Basin | 59 min |
| Aug 7, 7:15 PM MDT | Severe Thunderstorm Warning | TFX | Toole | 75 min |
| Aug 7, 7:44 PM MDT | Severe Thunderstorm Warning | TFX | Toole | 31 min |
| Aug 7, 8:42 PM MDT | Severe Thunderstorm Warning | TFX | Liberty, Toole | 18 min |
| Aug 8, 5:47 PM MDT | Severe Thunderstorm Warning | TFX | Jefferson, Lewis and Clark | 28 min |
| Aug 9, 1:56 PM MDT | Severe Thunderstorm Warning | MSO | Ravalli | 34 min |
| Aug 9, 4:08 PM MDT | Severe Thunderstorm Warning | BYZ | Powder River | 52 min |
| Aug 9, 4:27 PM MDT | Severe Thunderstorm Warning | TFX | Lewis and Clark, Pondera, Teton | 33 min |
| Aug 9, 4:30 PM MDT | Severe Thunderstorm Warning | TFX | Cascade | 30 min |
| Aug 9, 4:58 PM MDT | Severe Thunderstorm Warning | BYZ | Carter, Powder River | 62 min |
| Aug 9, 5:37 PM MDT | Severe Thunderstorm Warning | TFX | Cascade, Meagher | 23 min |
| Aug 9, 5:52 PM MDT | Severe Thunderstorm Warning | TFX | Cascade, Chouteau, Judith Basin | 38 min |
| Aug 9, 5:53 PM MDT | Severe Thunderstorm Warning | BYZ | Carter | 52 min |
| Aug 9, 5:56 PM MDT | Severe Thunderstorm Warning | TFX | Cascade, Chouteau, Judith Basin, Meagher | 49 min |
| Aug 9, 6:16 PM MDT | Severe Thunderstorm Warning | TFX | Cascade, Judith Basin | 29 min |
| Aug 9, 6:22 PM MDT | Severe Thunderstorm Warning | TFX | Cascade, Chouteau | 38 min |
| Aug 9, 6:24 PM MDT | Severe Thunderstorm Warning | TFX | Cascade, Chouteau, Fergus, Judith Basin | 51 min |
| Aug 9, 6:58 PM MDT | Severe Thunderstorm Warning | TFX | Chouteau, Fergus, Judith Basin | 47 min |
| Aug 9, 7:39 PM MDT | Severe Thunderstorm Warning | TFX | Fergus | 36 min |
| Aug 9, 8:08 PM MDT | Severe Thunderstorm Warning | TFX | Blaine, Fergus | 67 min |
| Aug 9, 9:43 PM MDT | Severe Thunderstorm Warning | BYZ | Fallon | 25 min |
| Aug 9, 9:59 PM MDT | Severe Thunderstorm Warning | GGW | Phillips, Valley | 61 min |
| Aug 9, 10:46 PM MDT | Severe Thunderstorm Warning | GGW | Garfield, McCone, Phillips, Valley | 59 min |
| Aug 9, 11:45 PM MDT | Severe Thunderstorm Warning | TFX | Cascade, Judith Basin, Meagher | 30 min |
| Aug 10, 12:08 AM MDT | Severe Thunderstorm Warning | TFX | Cascade, Chouteau, Pondera, Teton | 37 min |
| Aug 10, 12:32 AM MDT | Severe Thunderstorm Warning | TFX | Chouteau, Judith Basin | 28 min |
| Aug 10, 12:58 AM MDT | Severe Thunderstorm Warning | TFX | Chouteau, Fergus | 32 min |
| Aug 10, 1:30 AM MDT | Severe Thunderstorm Warning | TFX | Blaine, Chouteau, Fergus | 30 min |
| Aug 10, 1:57 AM MDT | Severe Thunderstorm Warning | TFX | Blaine, Fergus | 63 min |
| Aug 14, 4:24 PM MDT | Severe Thunderstorm Warning | GGW | Garfield, McCone | 66 min |
| Aug 14, 5:00 PM MDT | Severe Thunderstorm Warning | TFX | Glacier | 45 min |
| Aug 14, 5:06 PM MDT | Severe Thunderstorm Warning | GGW | McCone, Prairie | 54 min |
| Aug 18, 12:33 AM MDT | Severe Thunderstorm Warning | TFX | Cascade | 57 min |
| Aug 18, 1:33 AM MDT | Severe Thunderstorm Warning | TFX | Cascade, Chouteau | 42 min |
| Aug 18, 1:47 AM MDT | Severe Thunderstorm Warning | TFX | Cascade | 24 min |
| Aug 18, 1:53 AM MDT | Severe Thunderstorm Warning | TFX | Chouteau | 38 min |
| Sep 1, 7:50 PM MDT | Severe Thunderstorm Warning | BYZ | Big Horn, Powder River, Rosebud | 55 min |
| Sep 1, 8:22 PM MDT | Severe Thunderstorm Warning | BYZ | Powder River, Rosebud | 23 min |
| Sep 2, 8:23 PM MDT | Severe Thunderstorm Warning | GGW | Dawson, McCone, Prairie, Richland, Wibaux | 67 min |
| Sep 2, 9:19 PM MDT | Severe Thunderstorm Warning | GGW | Richland, Roosevelt | 56 min |
| Sep 5, 5:13 PM MDT | Severe Thunderstorm Warning | BYZ | Big Horn, Yellowstone | 34 min |
| Sep 7, 5:42 AM MDT | Severe Thunderstorm Warning | GGW | Dawson, McCone | 28 min |
By county
Every county with at least one alert. A county page lists each alert that covered it.
- Garfield County57
- Valley County56
- McCone County52
- Fergus County40
- Chouteau County35
- Phillips County33
- Dawson County30
- Prairie County29
- Cascade County29
- Powder River County26
- Roosevelt County25
- Judith Basin County25
- Rosebud County20
- Blaine County19
- Big Horn County17
- Yellowstone County16
- Richland County16
- Daniels County15
- Wibaux County14
- Hill County13
- Petroleum County13
- Custer County13
- Fallon County13
- Meagher County11
- Musselshell County10
- Sheridan County10
- Carter County10
- Stillwater County8
- Broadwater County7
- Glacier County7
- Carbon County6
- Golden Valley County6
- Treasure County6
- Lewis and Clark County6
- Teton County6
- Jefferson County5
- Wheatland County4
- Sweet Grass County4
- Flathead County4
- Sanders County4
The busiest days
Days with the most alerts issued, by UTC date.
Nearby
Alerts in force nowTornadoes on recordThe radar archive20152017
Sources
National Weather Service watches, warnings, advisories and statements from the Iowa Environmental Mesonet's VTEC archive, which reconstructs tornado, severe thunderstorm, flash flood and marine warnings back to 1986 from the NWS text archive. Storm Prediction Center watches and mesoscale discussions from SPC's archive through the Mesonet. County centers from the US Census Bureau. Warning verification from the Mesonet's Cow. Rebuilt daily.